Steam boiler



Mar-ch 18, 19%. G. W. EACH mswsa STEAM BOILER Filed July 28, 1925 Boooooorgfiooqgoooooooooo 000000000 0 v Patented Mar. 18, 1930 UNITED ST usaess GEORGE W. BACI-I, OF ERIE, PENNSYLVANIA, ASSIGNOR 'I'O UNION IRON WORKS, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA STEAM BOILER Application filed July 28, 1925. Serial No. 46,596.

This invention is designed to improve steam boilers having at least one upper drum and a lower drum connected by tubes and has particular reference to the manner of introducing feed water to this type of boiler. In carrying out my invention I form the feed water spaces at each end of the upper drum and connect these spaces, preferably below the Water level and above the bottom, 16 with the central part of the drum and introduce feed water through the pipe leading through the central part of the drum so that the water is partially heated before it is delivered to the water spaces at the end of the drum, the purpose being to deliver the water in condition to separate the impurities from the water as much as possible in the feed water space of the drum. Features and details of the invention will appear from the specification and claim.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows an end view of a boiler, the setting being partly in section.

Fig. 2 a central section of a drum showing an enlarged view of the feed water space.

Fig. 3 a perspective view of the nozzle delivering the feed water.

1 marks the upper drum, 2 the lower drum, 3 the connecting tubes, it being understood that the number of drums is not necessarily limited, 4 the furnace walls which ordinarily lead to a point slightly inwardly from the ends of the drum; and 5 the steam discharge 5 from the upper drum.

The feed water is introduced through a pipe 6 and preferably to some point in the central part of the drum and the pipe 6 is connected by a pipe 7 with the feed water spaces 8 of the drum. The feed water spaces 8 are separated from the steaming space at the center by partitions 9 which preferably extend upwardly above the water level. The

feed water is preferably delivered through anozzle 10 adjacent to the bottom of the feed water space. The feed water space is connected with the steaming space through openings 11 in the partitions 9, these openings being below the water level but above the bottom. It will be understood that some impurities in the feed water rise to the surface and that other impurities are precipitated to the bottom, the openings, therefore, more nearly approximating the pure water than can be accomplished from other levels in the water of the feed water space. Blow-off pipes 12 are connected to the bottoms of the water spaces and shimmers 13 are arranged at the water level and are connected with the blow-off pipes 14.

In the operation of the device, the feed water is delivered through the pipe 6 and more or less heated in its passage through the steam space of the boiler so that it reaches the feed water spaces slightly warm. This preliminary heating converts some of the impurities to a condition that will more readily cause them to separate from the rest of the water. The feed-water passes from thefeed Water spaces to the openings 11 to the steaming space, the impuritiesrising to the top being drawn off by the skimmers l3 and the impurities precipitated to the bottom being drawn ofi through the pipe 12.

It will be noted that the feed water spaces project outwardly from the furnace walls. Thus this space which is not subjected to the direct action of the furnace heat is utilized for the feed water delivery.

What I claim as new is In a steam boiler, the combination of an upper drum a lower drum; connecting tubes, the ends of the upper drum extending outwardly from the tube space; partitions separating the upper drum into a central steam.- ing space and end feedwater spaces; a, feed water pipe leading into the steaming space of the upper drum and discharging into the feed water spaces; and furnace walls set inwardly from the ends of the drum leaving the feed water spaces projecting to without the walls.

In testimony whereof'I have hereunto set In hand.

y GEORGE W. BACH. 

